package parser

import (
	"errors"
	"regexp"
	"strings"
	"time"
)

const (
	FlopRegex        = `(?m)\((?P<type>\w{3}).*(.|\n|\r).*\)`
	DestinationRegex = `(?P<dest>\w+)(?P<time>\d{0,4})?`
	DOFRegex         = `(?m)DOF\/(?P<time>\d{6})`
	TypeArrival      = "ARR"
	TypeDeparture    = "DEP"
	TypeFlightPlan   = "FPL"
	TypeDelay        = "DLA"
)

var flopRegex = regexp.MustCompile(FlopRegex)

func parseArrOrDep(telegram *Telegram, data string) {
	/**
	 * example:
	 * (ARR-CSN3126/A5040-ZSPD-ZBTJ1601)
	 * (DEP-CSN3125/A4553-ZGHA0554-ZBTJ-DOF/120820)
	 */
	values := getSplitValues(data)
	l := len(values)
	if l < 4 {
		telegram.ParseErrors = append(telegram.ParseErrors, errors.New("arrival data less than 4 "))
		return
	}

	telegram.FlightNumber, telegram.RegisterNumber = parseFlight(values[1])
	telegram.Departure, telegram.DepartureTime = getAirportAndTime(values[2])
	telegram.Destination, telegram.DestinationTime = getAirportAndTime(values[3])
	if l == 5 {
		parseDof(telegram, values[4])
	}
	telegram.Parsed = true
}

func parseFlightPlan(telegram *Telegram, data string) {
	/**
	* example:
	* (FPL-AAR997-IS
	* -B763/H-SDHIPRWZ/S
	* -RKSI0120
	* -N0473F320 NOPIK1B NOPIK G597 GONAV/N0473F320 G597 AGAVO/K0876S0980
	* G597 DONVO A326 ANRAT ANRAT2A
	* -ZBTJ0126 ZBAA
	* -EET/ZSHA0025 ZYSH0039 ZBPE0059 REG/HL7507 SEL/KRHJ OPR/AAR
	* DOF/090516 RMK/TCAS II EQUIPPED NAV/RNAV1 RNAV5 STS/CARGO)
	* NNNN
	 */
	values := getSplitValues(data)
	telegram.FlightNumber = values[1]
	telegram.Plane = values[3]
	telegram.Departure, telegram.DepartureTime = getAirportAndTime(values[5])
	destString := strings.Split(values[7], " ")
	telegram.Destination, telegram.DestinationTime = getAirportAndTime(destString[0])
	parseDof(telegram, values[8])

}

func parseDelay(telegram *Telegram, data string) {
	/**
	 * sample:
	 * (DLA‐ABC123‐NZAA0145‐VTBS‐DOF/091120)
	 */
	values := getSplitValues(data)
	telegram.FlightNumber = values[1]
	telegram.Departure, telegram.DepartureTime = getAirportAndTime(values[2])
	telegram.Destination, telegram.DestinationTime = getAirportAndTime(values[3])
	if len(values) == 5 {
		parseDof(telegram, values[4])
	}
}

func parseDof(telegram *Telegram, text string) {
	if dof := getFields(DOFRegex, text); len(dof) == 1 {
		telegram.DateOfFlight, _ = time.Parse("060102", dof["time"])
	}
}